Marine Weather and Tides
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
|Sunrise 7:08AM||Sunset 7:46PM||Saturday April 4, 2020 7:49 PM EDT (23:49 UTC)||Moonrise 3:06PM||Moonset 3:59AM||Illumination 90%|
7 Day Forecast for Marine Location Near St. Augustine Beach, FLHourly EDIT Help
Area Discussion for - Jacksonville, FL  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS62 KJAX 041943 AFDJAX
Area Forecast Discussion National Weather Service Jacksonville FL 343 PM EDT Sat Apr 4 2020
NEAR TERM [Through Tonight].
Weak backdoor frontal boundary that settled southward today will drift inland through southeast GA tonight and portions of northeast FL and then stall. Flow aloft currently is west- northwest, but an upstream complex shortwave system over TX and LA will push eastward tonight, and be located right at our door step Sunday 12Z. This system will transport much more moisture than there is currently and some slight chance of rain by the morning.
SHORT TERM [Sunday Through Monday Night].
Sunday . Almost the entire day we expect cloudy skies as the shortwave with some substantial mid level vorticity pushes through the region. PWATS will be around the 1.3 to 1.5 inch range. By the late afternoon, neg vort advection should be developing as the shortwave begins to move out of the area so decreased cloudiness seems probable in the aftn. The shortwave trough may induce weak low pressure along the stalled frontal boundary over the forecast area. Expect scattered shower activity to develop given the front and shortwave activity passing through. Best chances at this time look to be over northeast FL mainly to the north of GNV. Highs not as warm as today but mid 70s to near 80 are in the forecast at this time.
Monday . Surface high pressure will return to the area with the mid and upper level ridge remaining in place aloft, rendering dry conditions once again. Highs will warm back up into the mid 80s, with low 80s along the immediate coastline.
LONG TERM [Tuesday Through Saturday].
A weak pressure pattern will remain in place aloft of the local area next week, with broad ridging over the north-central Gulf coastline and a few shortwave impulses rounding over the top of the ridge. To our north, however, the pattern is more active. On Tuesday, a low pressure system moving off the New England coastline will drag a weak cold front into SE GA, though it will stall out near the state line. Scattered showers and isolated thunderstorms are possible with this system Tuesday through Wednesday night, mostly in SE GA. On Thursday, a more potent upper level vort max will dig into the Great Lakes region, developing another cold front that will move across the southeast Thursday night-Friday.
Warming temperatures will continue early in the week with prevailing west-southwest flow. Highs will be in the 80s Tue and Wed, possibly returning to the low 90s Thu with morning lows in the 60s. Behind the cold front passage Friday, however, noticeably cooler temperatures will advect into the area with highs dropping back down to the 70s by Saturday and morning lows dipping back into the 50s.
AVIATION. [Through 18Z Sunday]
High pressure will dominate the pattern today with an east coast sea breeze moving west across the Florida Peninsula and interior southeast Georgia through 05/06 UTC. An upper level impulse will move east along the upper Gulf Coast through Sunday with gradually lowering and thickening upper and mid-level cloudiness overnight. As we move into tomorrow morning, between 05/12Z and 05/18Z, should see thickening low cloudiness between 2.5-5 kft with some light rain breaking out across the region and especially over the Florida fields. Cecil could see some light fog overnight between 3-5 SM from 05/09Z to 05/13Z.
Long period swells from the northeast driven by a low pressure system over the northwestern Atlantic waters will lead to increasing seas. Offshore waters south of Fernandina Beach will see waves build to 4 to 6 feet tonight, peaking around 5 to 7 feet Sunday and Sunday night. A weak backdoor cold front Sunday will lead to chances for showers. On Tuesday, another weak front will move into the region, followed by yet another front around Thursday night, bringing a return for thunderstorm chances in addition to more showers mid-week.
Near critical low RH values of 25-35% will continue through the afternoon before rising in the evening hours. Conditions tomorrow are expected to be less dry with minimum RH values in the 40s and 50s as light rain moves in from out of the SE, with RH levels expected to remain above critical criteria for the rest of the week. Winds will build from out of the east on Sunday to about 5-10 mph for inland areas and up to about 10-15 mph with gusts of about 20-25 mph for areas affected by the east coast sea breeze in the afternoon.
The Altamaha River in SE GA remains elevated this weekend. The gauge at Baxley continues its broad crest in minor flood stage today, with the sites at Charlotteville, Doctortown, and Everett City remaining in action stage.
PRELIMINARY POINT TEMPS/POPS.
AMG 58 80 57 84 63 / 10 30 0 10 0 SSI 63 74 62 78 64 / 10 30 0 10 0 JAX 62 79 61 83 63 / 10 40 0 10 0 SGJ 63 76 62 80 63 / 10 40 20 0 0 GNV 58 80 59 85 61 / 10 30 0 10 0 OCF 58 80 59 85 61 / 10 30 0 10 0
JAX WATCHES/WARNINGS/ADVISORIES. FL . None. GA . None. AM . Small Craft Advisory from 10 AM Sunday to 8 AM EDT Monday for Waters from Fernandina Beach to St. Augustine FL from 20 to 60 NM-Waters from St. Augustine to Flagler Beach FL from 20 to 60 NM.
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|SAUF1 - St. Augustine, FL||1 mi||50 min||E 7 G 8||71°F||71°F||1013 hPa (+0.5)|
|41117||13 mi||80 min||71°F||2 ft|
|GTXF1 - Guana Tolomato Matanzas Reserve, FL||15 mi||65 min||ESE 5.1||73°F||1014 hPa||58°F|
|LTJF1||37 mi||56 min||72°F||54°F|
|MYPF1 - 8720218 - Mayport (Bar Pilots Dock), FL||38 mi||50 min||SE 7 G 9.9||72°F||69°F||1013 hPa (+0.5)|
|BLIF1||39 mi||56 min||ESE 8.9 G 11||73°F||1013.4 hPa||55°F|
|DMSF1||39 mi||50 min||71°F|
|NFDF1||41 mi||50 min||E 8.9 G 9.9||73°F|
Wind History for I-295 Bridge, St Johns River, FL(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Northeast Florida Regional Airport, FL||8 mi||54 min||E 10||10.00 mi||Fair||72°F||59°F||64%||1012.9 hPa|
Link to 5 minute data for KSGJ
Wind History from SGJ (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||W||E||E||E||E||E||E||E||E||SE|
|2 days ago||NE||NE||NE||NE||NE||NE||W||Calm||W||Calm||Calm||Calm||NW||NW||NW||NE||NE||NE||NE||E||E||E||E |
EDIT Weekend mode (on/off) (on/off)  Help One Week of Data
EDIT (on/off)  Help One Week of Data
Weather Map(on/off)  Help Weather Map
GEOS Local Image of Southeast EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Jacksonville, FL (19,4,5,8)(on/off)  Help
Ad by Google
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines anyway.
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.